Principles of Geotechnical Engineering (MindTap Course List)
9th Edition
ISBN: 9781305970939
Author: Braja M. Das, Khaled Sobhan
Publisher: Cengage Learning
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Chapter 6, Problem 6.5P
To determine
The relative compaction in the field.
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Problem 1:The results of a standard Proctor test are given in the following table. Given: Mold volume = 1/30 ft^3 and Gs = 2.69. Determine the void ratio and the degree of saturation at the optimum moisture content.
Trial #
Weight of moist soil in the mold (lb)
Moisture content (%)
1
3.7
8.6
2
4.15
10.6
3
4.69
12.5
4
4.62
14.9
5
4.02
16.7
6
3.63
18.3
Problem 2The laboratory test in Problem 1 is used to develop field compaction specification for a highway project. A field unit weight determination during the construction revealed that the in situ moist unit weight is 124 lb/ft3 and the moisture content is 13.7%. Determine the relative compaction in the field.
9. The results of a Standard Proctoretest is tabulated as follows: (CHECK PICTURE)
Determine the maximum dry unit weight of compaction
Determine the void ratio at the optimum moisture content Gs = 2.68
Determine the optimum moisture content
Determine the degree of saturation at the optimum moisture content
The Table 4 shows the results of a Standard Proctor Compaction test. Based on the information provided, determine the following values.
The maximum dry unit weight and the OMC.The degree of saturation at the maximum dry density if Gs = 2.70.What is the dry unit weight and the moisture range at 95% relative compaction (RC)?The degree of saturation at the maximum dry density if Gs = 2.70.
Table 4: Results of a standard Proctor compaction test
Trial No.
1
2
3
4
5
6
Moisture content, w (%)
6.2
8.1
9.8
11.5
12.3
13.2
Bulk unit weight (kN/m3)
16.9
18.7
19.5
20.5
20.4
20.1
Dry unit weight (kN/m3)
15.9
17.3
17.8
18.4
18.2
17.8
Chapter 6 Solutions
Principles of Geotechnical Engineering (MindTap Course List)
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Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, civil-engineering and related others by exploring similar questions and additional content below.Similar questions
- 10. The results of a Standard Proctoretest is tabulated as follows: (SEE PICTURE) Determine the maximum dry unit weight of compaction Determine the optimum moisture content Determine the void ratio at the optimum moisture content Gs = 2.70 Determine the degree of saturation at the optimum moisture content A field unit determination test for the soil, yielded the following data. Moisture content = 12% and moist unit weight = 106 pcf. Determine the relative compaction.arrow_forwardThe results of a standard Proctor test are given in the following table. Determine the maximum dry density (kg/m3) of compaction and the optimum moisture content. Volume of Proctor mold (cm3) Mass of wet soil in the mold (kg) Moisture content (%) 943.3 943.3 943.3 943.3 943.3 943.3 943.3 943.3 1.6 1.71 1.77 1.83 1.86 1.88 1.87 1.85 9.9 10.6 12.1 13.8 15.1 17.4 19.4 21.2arrow_forwardResults of a standard proctor ompaction test on a silty sand are shown. PLEASE COMPLETE SOLUTION. 1) Find the maximum dry unit weight and optimum moisture content. 2) What is the moist unit weight at optimum moisture content? 3) What is the degree of saturation at optimum moisture content? Given: ?? = 2.69 4) If the required field dry unit weight is 18.5 ??/?3, what is the relative compaction? 5) What should be the range of compaction moisture contents in the field to achieve the above relative compaction? 6) If the minimum and maximum void ratios are 0.31 and 0.82, respectively, what is the relative density of compaction in the field?arrow_forward
- Determine the maximum dry unit weight of compaction Determine the optimum moisture content Determine the void ratio at the optimum moisture content. Gs = 2.70 Determine the degree of saturation at the optimum moisture content A field unit determination test for the soil, yielded the following data. Moisture content = 12% and moist unit weight = 106 lb/cu.ft. Determine the relative compaction.arrow_forwardA modified Proctor compaction test was carried out using a cylindrical moldwith a 1000 ml volume. Table 2 summarizes the results.a. Plot the compaction and ZAV curves (RD=2.75 and ρwater=1000 kg/m3).b. Determine the maximum dry density and the optimum moisture content.arrow_forwardA 1972 kg/mᶟ wet unit weight and 5.5% average actual moisture content were obtained from a laboratory data during the conduct of FDT on an aggregate base coarse materials, what is the dry unit weight of the soil? From the above laboratory data and the obtained dry unit weight of soil, What will be the degree of compaction of the compacted materials when a 1960 kg/mᶟ maximum dry density is used as a reference Laboratory compaction data?arrow_forward
- The results of a standard Proctor test are given in the following table. Determine the maximum dry unit weight of compaction and the optimum moisture content. Also determine the moisture content required to achieve 90% of ꙋd (max).arrow_forward3. A sample of soft saturated clay has a volume of 100 cm3 and weighs 175 grams. If the oven dry weight is 120 grams, compute the water content, void ratio and specific gravity of the clay.arrow_forwardDuring a consolidation test, an increment pressure of 153 kN/m2 was applied to a sample of saturated clay initially 20 mm thick. When equilibrium was reached the thickness of the sample was reduced to 18.3 mm. The pressure was then removed and the sample was allowed to expand. The final thickness was recorded as 19.3 mm and the final moisture content was 30.1%. If the specific gravity of the particles is 2.65 and the sample was saturated throughout the test, determine the following: 8.1 Voids ratio before and after consolidation. 8.2 The average coefficient of volume change over the range of pressure appliedarrow_forward
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